Hinge.



JAMES W. DONALDSON, OF HOUSTON, TEXAS.

HINGE Specification of Letters Patent.

Patented March 10, 1908.

Application filed July 9, 1907. Serial No. 382,903.

To all whom it may concern:

Be it known that I, JAMES W. DONALD- soN, of the United States, residingat Houston, in the county of Harris and State of Texas, have inventednew and useful Improvements in Hinges, of which the following is aspecification.

This invention relates to hinges designed for use in connection withdoors or gates; and has for its objects to provide a comparativelysimple and inexpensive device of this character wherein the cooperatinghinge butts are provided with meeting cam faces which serve when thedoor or gate is opened to raise the same vertically to over-rideobstructions; one wherein the hinge will, when ap lied to a door, permitthe same, when close to rest upon the lower sill, thus to exclude wind,rain or snow, and one wherein the pintle may be readily reversed for theapplication of the hinge to right or left hand doors.

With these and other objects in view, the invention comprises the novelfeatures of construction and combination of parts more fully hereinafterdescribed.

In the accompanying drawings. Figure 1 is a view showing the hingestanding in open position. Fig. 2 is a side elevation of a hingeembodying the'invention and showing the osition of the parts when thedooris closed.

ig. 3 is a view of hinge leaves showing side elevation of leaf #1,(Fig. 1) with leaf #2, (Fig. 4) at right angles to each other. Fig. 4 isa view of one of the hinge leaves.

Referring to the drawings it will be seen that the hinge comprises apair of companion members or leaves 1 and 2, adapted for attachment,respectively, to a door or other swinging closure and its casing orsupport, said leaves being provided with tubular butts or knuckles 3 forthe reception of a pintle 84 by means of which the leaves are pivotallyconnected.

As seen more clearly in Fig. 3, each hinge butt is provided with twooppositely itched spiral or convolute cam faces 5, w 'ch at t eirhighest points 6-are straight, or occupy a position approximately atright angles to the pintle 8-4. The cam faces on one butt are itched inthe same curves but reversely to t ose on the adjacent end of the otherbutt, whereby the meeting ends of the butts will, when the leaves standin closed position either a right or left-han door.

as in Fig. 2, lie in close contact with the adjacent edges of the leavesoverlapping.

In practice, when the door or other swinging closure is in closedposition it will rest on the sill or other under-lying surface, thus notonly to relieve the hinges of the weight of the closure, but in theinstance of doors to provide for an air-tight joint at the bottomthereof to exclude wind, rain or snow. When the closure is moved to openposition the convolute cams on the upper hinge butts will ride upwardlyon the corresponding cams at the upper end of the companion butt,thereby raising the closure to cause the same to override surfaceobstructions, the degree of lift imparted to the closure being, ofcourse, dependent upon the length of s iral extension of the convolutecam ends of the hinge butts.

An. important feature of the invention is the provision of efficientmeans whereby, when the door is half way open it may be held in thisposition, but be readily further opened, or closed. This result issecured by providin each of the cams with the flat or straig t portions6 that by coaction with the adjacent cam will secure the object sought.

Another important feature is the lug 7, which is an extension ofknuckles 3, leaf 2, which gives the leaf 1, more bearing thus prolongingthe life of hinge.

It will be noted that by sim ly reversing the pintle 8-4 the hin e willoperate on What I claim is:

A hinge made up of a leaf having apertured bosses upon one of its edgesand spaced apart, the inner face of each boss being camoutlined,portions of the inner end of each boss being in parallel planes andforming the inner walls of a recess between the bosses, a second leafhaving an apertured boss with its opposite ends having parallel and camsurfaces corresponding to the parallel and cam surfaces u on the bossesof the other leaf, as shown an for the purpose set forth.

In testimony whereof, I affix my signature in presence of two witnesses.

JAMES w. DONALDSON.

Witnesses:

RoB'r. H. HANNA, H. FRANKLIN.

